Once upon a time there was a guy who went by Kibo who would search Usenet feeds for posts mentioning his username and reply to them...

I bet Musk hacked something together (or has a column in TweetDeck if that's still around) that continuously searches for mentions. I wonder if there's a tool like that that covers more of the internet, although the primary users would only be famous people and/or their agents / social media staff.

Kibo greps